28380774 has 32 divisors (see below), whose sum is σ = 59520384. Its totient is φ = 9011520.

The previous prime is 28380773. The next prime is 28380791. The reversal of 28380774 is 47708382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9237 + ... + 11919.

It is an arithmetic number, because the mean of its divisors is an integer number (1860012).

Almost surely, 2^28380774 is an apocalyptic number.

28380774 is an abundant number, since it is smaller than the sum of its proper divisors (31139610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28380774 is a wasteful number, since it uses less digits than its factorization.

28380774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 28380774 is about 5327.3608850912. The cubic root of 28380774 is about 305.0291972407.

It can be divided in two parts, 283807 and 74, that added together give a triangular number (283881 = T₇₅₃).

The spelling of 28380774 in words is "twenty-eight million, three hundred eighty thousand, seven hundred seventy-four".